http://www.petersononline.com/birds/
http://www-stat.wharton.upenn.edu/~siler/birding.html
Birding mnemonic tricks
U.K. site w/ U.S. links
Birding spots, trips, links
National Audobon Society
Cornell
NARC
Victor Fazio
Electronic resources
Wilson Society
Birdlinks 1
Birdlinks 2
Ornithology resources on the Internet
Birdsong
Birds Costa Rica
The Prairie Falcon Flint Hills birding
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